[u/mrichter/AliRoot.git] / MUON / AliMUONRecoCheck.cxx

/**************************************************************************
 * Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
 *                                                                        *
 * Author: The ALICE Off-line Project.                                    *
 * Contributors are mentioned in the code where appropriate.              *
 *                                                                        *
 * Permission to use, copy, modify and distribute this software and its   *
 * documentation strictly for non-commercial purposes is hereby granted   *
 * without fee, provided that the above copyright notice appears in all   *
 * copies and that both the copyright notice and this permission notice   *
 * appear in the supporting documentation. The authors make no claims     *
 * about the suitability of this software for any purpose. It is          *
 * provided "as is" without express or implied warranty.                  *
 **************************************************************************/

/* $Id$ */

/// \class AliMUONRecoCheck
/// \brief Utility class to check reconstruction
/// Reconstructed tracks are compared to reference tracks. 
/// The reference tracks are built from AliTrackReference for the
/// hit in chamber (0..9) and from kinematics for the vertex parameters.     

#include "AliMUON.h"
#include "AliMUONRecoCheck.h"
#include "AliMUONTrack.h"
#include "AliMUONData.h"
#include "AliMUONConstants.h"

#include "AliLoader.h" 
#include "AliRunLoader.h" 
#include "AliHeader.h"
#include "AliStack.h"
#include "AliTrackReference.h"
#include "AliLog.h" 

#include <TParticle.h>

/// \cond CLASSIMP
ClassImp(AliMUONRecoCheck)
/// \endcond

//_____________________________________________________________________________
  AliMUONRecoCheck::AliMUONRecoCheck(Char_t *chLoader)
  : TObject(),
  fRunLoader(0x0),
  fMUONData(0x0),
  fMuonTrackRef(0x0),
  fTrackReco(0x0),
  fReconstructibleTracks(0),
  fRecoTracks(0),
  fIsLoadConstructor(kTRUE)
{
/// Constructor using "galice.root",
/// takes care of loading/unloading Kinematics, TrackRefs and Tracks

  fMuonTrackRef = new TClonesArray("AliMUONTrack", 10);

  // run loader
  fRunLoader = AliRunLoader::Open(chLoader);
  if (!fRunLoader) {
    AliError(Form("no run loader found " ));
    return;
  }

 // initialize loader 	 
  AliLoader *loader = fRunLoader->GetLoader("MUONLoader");

  // container
  fMUONData  = new AliMUONData(loader,"MUON","MUON");
  if (!fMUONData) {
    AliError(Form("no MUONData found " ));
    return;
  }

  fRunLoader->LoadKinematics("READ"); 	 
  fRunLoader->LoadTrackRefs("READ"); 	 
  loader->LoadTracks("READ");

}

//_____________________________________________________________________________
  AliMUONRecoCheck::AliMUONRecoCheck(AliRunLoader *runloader, AliMUONData *muondata)
  : TObject(),
  fRunLoader(0x0),
  fMUONData(0x0),
  fMuonTrackRef(0x0),
  fTrackReco(0x0),
  fReconstructibleTracks(0),
  fRecoTracks(0),
  fIsLoadConstructor(kFALSE)
{
/// Constructor from AliRunLoader and AliMUONData,
/// does not load/unload Kinematics, TrackRefs and Tracks internally
/// it should be done in the execution program (e.g. see MUONRecoCheck.C)

  fMuonTrackRef = new TClonesArray("AliMUONTrack", 10);

  // run loader
  fRunLoader = runloader;
  if (!fRunLoader) {
    AliError(Form("no run loader found " ));
    return;
  }

  // container
  fMUONData  = muondata;
  if (!fMUONData) {
    AliError(Form("no MUONData found " ));
    return;
  }

}


//_____________________________________________________________________________
AliMUONRecoCheck::~AliMUONRecoCheck()
{
/// Destructor

  delete fMuonTrackRef;

  if(fIsLoadConstructor){
    fRunLoader->UnloadKinematics();
    fRunLoader->UnloadTrackRefs();
    fRunLoader->UnloadTracks();
    delete fMUONData;
  }

}

//_____________________________________________________________________________
void AliMUONRecoCheck::MakeTrackRef()
{
/// Make reconstructible tracks

  AliTrackReference *trackReference;
  AliMUONTrack *muonTrack;
  AliMUONTrackParam *trackParam;
  AliMUONHitForRec *hitForRec;
  Float_t x, y, z, pX, pY, pZ, pYZ;
  Int_t track, trackSave;
  TParticle *particle;   
  Float_t bendingSlope = 0;
  Float_t  nonBendingSlope = 0;
  Float_t inverseBendingMomentum = 0;
  
  TTree* treeTR = fRunLoader->TreeTR();
  if (treeTR == NULL) return;

  TBranch* branch = treeTR->GetBranch("MUON");
  if (branch == NULL) return;

  TClonesArray* trackRefs = 0;
  branch->SetAddress(&trackRefs);
  branch->SetAutoDelete(kTRUE);  

  Int_t nTrackRef = (Int_t)branch->GetEntries();
 
  track = trackSave = -999;
  Bool_t isNewTrack;
  Int_t iHitMin, iChamber, detElemId;

  trackParam = new AliMUONTrackParam();
  hitForRec = new AliMUONHitForRec();

  Int_t max = fRunLoader->GetHeader()->Stack()->GetNtrack();
  for (Int_t iTrackRef  = 0; iTrackRef < nTrackRef; iTrackRef++) {

    branch->GetEntry(iTrackRef);
    
    iHitMin = 0;
    isNewTrack = kTRUE;
    
    if (!trackRefs->GetEntries()) continue; 

    while (isNewTrack) {

      muonTrack = new AliMUONTrack();
      
      for (Int_t iHit = iHitMin; iHit < trackRefs->GetEntries(); iHit++) {
      
	trackReference = (AliTrackReference*)trackRefs->At(iHit);
	x = trackReference->X();
	y = trackReference->Y();
	z = trackReference->Z();
	pX = trackReference->Px();
	pY = trackReference->Py();
	pZ = trackReference->Pz();

	track = trackReference->GetTrack();

	if(track >= max){
	  AliWarningStream()
	    << "Track ID " << track 
	    << " larger than max number of particles " << max << endl;
	  isNewTrack = kFALSE;
	  break;
	}
	if (track != trackSave && iHit != 0) {
	  iHitMin = iHit;
	  trackSave = track;
	  break;
	}

	// track parameters at hit
	trackParam->SetBendingCoor(y);
	trackParam->SetNonBendingCoor(x);
	trackParam->SetZ(z);

	if (TMath::Abs(pZ) > 0) {
	  bendingSlope = pY/pZ;
	  nonBendingSlope = pX/pZ;
	}
	pYZ = TMath::Sqrt(pY*pY+pZ*pZ);
	if (pYZ >0) inverseBendingMomentum = 1/pYZ; 

	trackParam->SetBendingSlope(bendingSlope);
	trackParam->SetNonBendingSlope(nonBendingSlope);
	trackParam->SetInverseBendingMomentum(inverseBendingMomentum);

	hitForRec->SetBendingCoor(y);
	hitForRec->SetNonBendingCoor(x);
	hitForRec->SetZ(z);
	hitForRec->SetBendingReso2(0.0); 
	hitForRec->SetNonBendingReso2(0.0);
	detElemId = hitForRec->GetDetElemId();
	if (detElemId) iChamber = detElemId / 100 - 1; 
	else iChamber = AliMUONConstants::ChamberNumber(z);
	hitForRec->SetChamberNumber(iChamber);

	muonTrack->AddTrackParamAtHit(trackParam,0);
	muonTrack->AddHitForRecAtHit(hitForRec);
	muonTrack->SetTrackID(track);

	trackSave = track;
	if (iHit == trackRefs->GetEntries()-1) isNewTrack = kFALSE;
      }

      // track parameters at vertex 
      particle = fRunLoader->GetHeader()->Stack()->Particle(muonTrack->GetTrackID());

      if (particle) {

	x = particle->Vx();
	y = particle->Vy();
	z = particle->Vz();
	pX = particle->Px();
	pY = particle->Py();
	pZ = particle->Pz();

	trackParam->SetBendingCoor(y);
	trackParam->SetNonBendingCoor(x);
	trackParam->SetZ(z);
	if (TMath::Abs(pZ) > 0) {
	  bendingSlope = pY/pZ;
	  nonBendingSlope = pX/pZ;
	}
	pYZ = TMath::Sqrt(pY*pY+pZ*pZ);
	if (pYZ >0) inverseBendingMomentum = 1/pYZ;       
	trackParam->SetBendingSlope(bendingSlope);
	trackParam->SetNonBendingSlope(nonBendingSlope);
	trackParam->SetInverseBendingMomentum(inverseBendingMomentum);
      
	muonTrack->SetTrackParamAtVertex(trackParam);
      }

      AddMuonTrackReference(muonTrack);
      delete muonTrack;
      muonTrack = NULL;
      
    } // end while isNewTrack
  }
  
  CleanMuonTrackRef();
  
  ReconstructibleTracks();

  delete trackParam;
  delete hitForRec;

}

//____________________________________________________________________________
TClonesArray* AliMUONRecoCheck::GetTrackReco()
{
/// Return TClonesArray of reconstructed tracks

  fMUONData->ResetRecTracks();
  fMUONData->SetTreeAddress("RT");
  fTrackReco = fMUONData->RecTracks(); 
  fMUONData->GetRecTracks();
  fRecoTracks = fTrackReco->GetEntriesFast();
  return fTrackReco;
}
//_____________________________________________________________________________
void AliMUONRecoCheck::PrintEvent() const
{
/// Debug facility

  AliMUONTrack *track;
  AliMUONHitForRec *hitForRec;
  TClonesArray *  hitForRecAtHit = 0;
  Float_t xRec,yRec,zRec;

  Int_t nTrackRef = fMuonTrackRef->GetEntriesFast();
  
  printf(" ******************************* \n");
  printf(" nb of tracks %d \n",nTrackRef);

  for (Int_t index = 0; index < nTrackRef; index++) {
    track = (AliMUONTrack*)fMuonTrackRef->At(index);
    hitForRecAtHit = track->GetHitForRecAtHit();
    Int_t nTrackHits = hitForRecAtHit->GetEntriesFast();
    printf(" track number %d \n",index);
    for (Int_t iHit = 0; iHit < nTrackHits; iHit++){
      hitForRec = (AliMUONHitForRec*) hitForRecAtHit->At(iHit); 
      xRec  = hitForRec->GetNonBendingCoor();
      yRec  = hitForRec->GetBendingCoor();
      zRec  = hitForRec->GetZ();
      printf("  x,y,z: %f , %f , %f \n",xRec,yRec,zRec);
    }
  }
}

//_____________________________________________________________________________
void AliMUONRecoCheck::ResetTracks() const
{
/// Reset tracks

  if (fMuonTrackRef) fMuonTrackRef->Clear();
}
//_____________________________________________________________________________
void AliMUONRecoCheck::CleanMuonTrackRef()
{
/// Re-calculate hits parameters because two AliTrackReferences are recorded for
/// each chamber (one when particle is entering + one when particle is leaving 
/// the sensitive volume) 

  Float_t maxGasGap = 1.; // cm 
  AliMUONTrack *track, *trackNew;
  AliMUONHitForRec *hitForRec, *hitForRec1, *hitForRec2;
  AliMUONTrackParam *trackParam, *trackParam1, *trackParam2, *trackParamAtVertex;
  TClonesArray *  hitForRecAtHit = 0;
  TClonesArray *  trackParamAtHit = 0;
  Float_t xRec,yRec,zRec;
  Float_t xRec1,yRec1,zRec1;
  Float_t xRec2,yRec2,zRec2;
  Float_t bendingSlope,nonBendingSlope,bendingMomentum;
  Float_t bendingSlope1,nonBendingSlope1,bendingMomentum1;
  Float_t bendingSlope2,nonBendingSlope2,bendingMomentum2;
  TClonesArray *newMuonTrackRef = new TClonesArray("AliMUONTrack", 10);
  Int_t iHit1;
  Int_t iChamber = 0, detElemId = 0;
  Int_t nRec = 0;
  Int_t nTrackHits = 0;

  hitForRec = new AliMUONHitForRec();
  trackParam = new AliMUONTrackParam();

  Int_t nTrackRef = fMuonTrackRef->GetEntriesFast();
  for (Int_t index = 0; index < nTrackRef; index++) {
    track = (AliMUONTrack*)fMuonTrackRef->At(index);
    hitForRecAtHit = track->GetHitForRecAtHit();
    trackParamAtHit = track->GetTrackParamAtHit();
    trackParamAtVertex = track->GetTrackParamAtVertex();
    nTrackHits = hitForRecAtHit->GetEntriesFast();
    trackNew = new AliMUONTrack();
    iHit1 = 0;
    while (iHit1 < nTrackHits) {
      hitForRec1 = (AliMUONHitForRec*) hitForRecAtHit->At(iHit1); 
      trackParam1 = (AliMUONTrackParam*) trackParamAtHit->At(iHit1); 
      xRec1  = hitForRec1->GetNonBendingCoor();
      yRec1  = hitForRec1->GetBendingCoor();
      zRec1  = hitForRec1->GetZ();	
      xRec   = xRec1;
      yRec   = yRec1;
      zRec   = zRec1;
      bendingSlope1 = trackParam1->GetBendingSlope();
      nonBendingSlope1 = trackParam1->GetNonBendingSlope();
      bendingMomentum1 = 0;
      if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0)
	bendingMomentum1 = 1./trackParam1->GetInverseBendingMomentum();
      bendingSlope = bendingSlope1;
      nonBendingSlope = nonBendingSlope1;
      bendingMomentum = bendingMomentum1;
      nRec = 1;  
      for (Int_t iHit2 = iHit1+1; iHit2 < nTrackHits; iHit2++) {
	hitForRec2 = (AliMUONHitForRec*) hitForRecAtHit->At(iHit2); 
	trackParam2 = (AliMUONTrackParam*) trackParamAtHit->At(iHit2); 
	xRec2  = hitForRec2->GetNonBendingCoor();
	yRec2  = hitForRec2->GetBendingCoor();
	zRec2  = hitForRec2->GetZ();	  
	bendingSlope2 = trackParam2->GetBendingSlope();
	nonBendingSlope2 = trackParam2->GetNonBendingSlope();
	bendingMomentum2 = 0;
	if (TMath::Abs(trackParam2->GetInverseBendingMomentum()) > 0)
	  bendingMomentum2 = 1./trackParam2->GetInverseBendingMomentum();
	
	if ( TMath::Abs(zRec2-zRec1) < maxGasGap ) {

	  nRec++;
	  xRec += xRec2;
	  yRec += yRec2;
	  zRec += zRec2;
	  bendingSlope += bendingSlope2;
	  nonBendingSlope += nonBendingSlope2;
	  bendingMomentum += bendingMomentum2;
	  iHit1 = iHit2;
	}
	
      } // end iHit2
      xRec /= (Float_t)nRec;
      yRec /= (Float_t)nRec;
      zRec /= (Float_t)nRec;
      bendingSlope /= (Float_t)nRec;
      nonBendingSlope /= (Float_t)nRec;
      bendingMomentum /= (Float_t)nRec;
      
      hitForRec->SetNonBendingCoor(xRec);
      hitForRec->SetBendingCoor(yRec);
      hitForRec->SetZ(zRec);
      detElemId = hitForRec->GetDetElemId();
      if (detElemId) iChamber = detElemId / 100 - 1;
      else iChamber = AliMUONConstants::ChamberNumber(zRec);
      hitForRec->SetChamberNumber(iChamber);
      hitForRec->SetBendingReso2(0.0); 
      hitForRec->SetNonBendingReso2(0.0); 
      trackParam->SetNonBendingCoor(xRec);
      trackParam->SetBendingCoor(yRec);
      trackParam->SetZ(zRec);
      trackParam->SetNonBendingSlope(nonBendingSlope);
      trackParam->SetBendingSlope(bendingSlope);
      if (TMath::Abs(bendingMomentum) > 0)
	trackParam->SetInverseBendingMomentum(1./bendingMomentum);

      trackNew->AddHitForRecAtHit(hitForRec);
      trackNew->AddTrackParamAtHit(trackParam,0);
      
      iHit1++;
    } // end iHit1

    trackNew->SetTrackID(track->GetTrackID());
    trackNew->SetTrackParamAtVertex(trackParamAtVertex);
    {new ((*newMuonTrackRef)[newMuonTrackRef->GetEntriesFast()]) AliMUONTrack(*trackNew);}   
    delete trackNew;
    trackNew = NULL;
    
  } // end trackRef

  fMuonTrackRef->Clear();
  nTrackRef = newMuonTrackRef->GetEntriesFast();
  for (Int_t index = 0; index < nTrackRef; index++) {
    track = (AliMUONTrack*)newMuonTrackRef->At(index);
    AddMuonTrackReference(track);
  }
  
  delete hitForRec;
  delete trackParam;
  newMuonTrackRef->Delete();
  delete newMuonTrackRef;
  
}

//_____________________________________________________________________________
void AliMUONRecoCheck::ReconstructibleTracks()
{
/// Calculate the number of reconstructible tracks
  
  AliMUONTrack* track;
  TClonesArray* hitForRecAtHit = NULL;
  AliMUONHitForRec* hitForRec;
  Float_t zRec;
  Int_t nTrackRef, nTrackHits;
  Int_t isChamberInTrack[10];
  Int_t iChamber = 0;
  Bool_t isTrackOK = kTRUE;

  fReconstructibleTracks = 0;

  nTrackRef = fMuonTrackRef->GetEntriesFast();
  for (Int_t index = 0; index < nTrackRef; index++) {
    track = (AliMUONTrack*)fMuonTrackRef->At(index);
    hitForRecAtHit = track->GetHitForRecAtHit();
    nTrackHits = hitForRecAtHit->GetEntriesFast();
    for (Int_t ch = 0; ch < 10; ch++) isChamberInTrack[ch] = 0;
 
    for ( Int_t iHit = 0; iHit < nTrackHits; iHit++) {
      hitForRec = (AliMUONHitForRec*) hitForRecAtHit->At(iHit); 
      zRec  = hitForRec->GetZ();
      iChamber = hitForRec->GetChamberNumber();
      if (iChamber < 0 || iChamber > 10) continue;
      isChamberInTrack[iChamber] = 1;
    } 
    // track is reconstructible if the particle is depositing a hit
    // in the following chamber combinations:

    isTrackOK = kTRUE;
    if (!isChamberInTrack[0] && !isChamberInTrack[1]) isTrackOK = kFALSE;
    if (!isChamberInTrack[2] && !isChamberInTrack[3]) isTrackOK = kFALSE;
    if (!isChamberInTrack[4] && !isChamberInTrack[5]) isTrackOK = kFALSE;
    Int_t nHitsInLastStations=0;
    for (Int_t ch = 6; ch < AliMUONConstants::NTrackingCh(); ch++)
      if (isChamberInTrack[ch]) nHitsInLastStations++; 
    if(nHitsInLastStations < 3) isTrackOK = kFALSE;

    if (isTrackOK) fReconstructibleTracks++;
    if (!isTrackOK) fMuonTrackRef->Remove(track); // remove non reconstructible tracks
  }
  fMuonTrackRef->Compress();
}
Commit	Line	Data
b8dc484b	1	/**************************************************************************
	2	* Copyright(c) 1998-1999, ALICE Experiment at CERN, All rights reserved. *
	3	* *
	4	* Author: The ALICE Off-line Project. *
	5	* Contributors are mentioned in the code where appropriate. *
	6	* *
	7	* Permission to use, copy, modify and distribute this software and its *
	8	* documentation strictly for non-commercial purposes is hereby granted *
	9	* without fee, provided that the above copyright notice appears in all *
	10	* copies and that both the copyright notice and this permission notice *
	11	* appear in the supporting documentation. The authors make no claims *
	12	* about the suitability of this software for any purpose. It is *
	13	* provided "as is" without express or implied warranty. *
	14	**************************************************************************/
	15
d19b6003	16	/* $Id$ */
d19b6003	17
5398f946	18	/// \class AliMUONRecoCheck
	19	/// \brief Utility class to check reconstruction
	20	/// Reconstructed tracks are compared to reference tracks.
	21	/// The reference tracks are built from AliTrackReference for the
	22	/// hit in chamber (0..9) and from kinematics for the vertex parameters.
b8dc484b	23
cc056de1	24	#include "AliMUON.h"
	25	#include "AliMUONRecoCheck.h"
	26	#include "AliMUONTrack.h"
	27	#include "AliMUONData.h"
	28	#include "AliMUONConstants.h"
b8dc484b	29
b8dc484b	30	#include "AliLoader.h"
b8dc484b	31	#include "AliRunLoader.h"
b8dc484b	32	#include "AliHeader.h"
b8dc484b	33	#include "AliStack.h"
cc056de1	34	#include "AliTrackReference.h"
	35	#include "AliLog.h"
	36
	37	#include <TParticle.h>
b8dc484b	38
5398f946	39	/// \cond CLASSIMP
b8dc484b	40	ClassImp(AliMUONRecoCheck)
5398f946	41	/// \endcond
b8dc484b	42
068e4c36	43	//_____________________________________________________________________________
	44	AliMUONRecoCheck::AliMUONRecoCheck(Char_t *chLoader)
	45	: TObject(),
	46	fRunLoader(0x0),
	47	fMUONData(0x0),
	48	fMuonTrackRef(0x0),
	49	fTrackReco(0x0),
	50	fReconstructibleTracks(0),
	51	fRecoTracks(0),
	52	fIsLoadConstructor(kTRUE)
	53	{
	54	/// Constructor using "galice.root",
	55	/// takes care of loading/unloading Kinematics, TrackRefs and Tracks
	56
	57	fMuonTrackRef = new TClonesArray("AliMUONTrack", 10);
	58
	59	// run loader
	60	fRunLoader = AliRunLoader::Open(chLoader);
	61	if (!fRunLoader) {
	62	AliError(Form("no run loader found " ));
	63	return;
	64	}
	65
	66	// initialize loader
	67	AliLoader *loader = fRunLoader->GetLoader("MUONLoader");
	68
	69	// container
	70	fMUONData = new AliMUONData(loader,"MUON","MUON");
	71	if (!fMUONData) {
	72	AliError(Form("no MUONData found " ));
	73	return;
	74	}
	75
	76	fRunLoader->LoadKinematics("READ");
	77	fRunLoader->LoadTrackRefs("READ");
	78	loader->LoadTracks("READ");
	79
	80	}
	81
b8dc484b	82	//_____________________________________________________________________________
45a05f07	83	AliMUONRecoCheck::AliMUONRecoCheck(AliRunLoader runloader, AliMUONData muondata)
54d7ba50	84	: TObject(),
	85	fRunLoader(0x0),
	86	fMUONData(0x0),
	87	fMuonTrackRef(0x0),
	88	fTrackReco(0x0),
	89	fReconstructibleTracks(0),
068e4c36	90	fRecoTracks(0),
068e4c36	91	fIsLoadConstructor(kFALSE)
b8dc484b	92	{
068e4c36	93	/// Constructor from AliRunLoader and AliMUONData,
	94	/// does not load/unload Kinematics, TrackRefs and Tracks internally
	95	/// it should be done in the execution program (e.g. see MUONRecoCheck.C)
5398f946	96
b8dc484b	97	fMuonTrackRef = new TClonesArray("AliMUONTrack", 10);
b8dc484b	98
45a05f07	99	// run loader
45a05f07	100	fRunLoader = runloader;
b8dc484b	101	if (!fRunLoader) {
45a05f07	102	AliError(Form("no run loader found " ));
b8dc484b	103	return;
b8dc484b	104	}
b8dc484b	105
45a05f07	106	// container
	107	fMUONData = muondata;
	108	if (!fMUONData) {
	109	AliError(Form("no MUONData found " ));
	110	return;
	111	}
b8dc484b	112
b8dc484b	113	}
b8dc484b	114
45a05f07	115
b8dc484b	116	//_____________________________________________________________________________
	117	AliMUONRecoCheck::~AliMUONRecoCheck()
	118	{
d19b6003	119	/// Destructor
d19b6003	120
b8dc484b	121	delete fMuonTrackRef;
068e4c36	122
	123	if(fIsLoadConstructor){
	124	fRunLoader->UnloadKinematics();
	125	fRunLoader->UnloadTrackRefs();
	126	fRunLoader->UnloadTracks();
	127	delete fMUONData;
	128	}
	129
b8dc484b	130	}
	131
	132	//_____________________________________________________________________________
	133	void AliMUONRecoCheck::MakeTrackRef()
	134	{
d19b6003	135	/// Make reconstructible tracks
b8dc484b	136
	137	AliTrackReference *trackReference;
	138	AliMUONTrack *muonTrack;
	139	AliMUONTrackParam *trackParam;
	140	AliMUONHitForRec *hitForRec;
	141	Float_t x, y, z, pX, pY, pZ, pYZ;
	142	Int_t track, trackSave;
	143	TParticle *particle;
	144	Float_t bendingSlope = 0;
	145	Float_t nonBendingSlope = 0;
	146	Float_t inverseBendingMomentum = 0;
	147
	148	TTree* treeTR = fRunLoader->TreeTR();
	149	if (treeTR == NULL) return;
	150
	151	TBranch* branch = treeTR->GetBranch("MUON");
	152	if (branch == NULL) return;
	153
de876dd1	154	TClonesArray* trackRefs = 0;
b8dc484b	155	branch->SetAddress(&trackRefs);
de876dd1	156	branch->SetAutoDelete(kTRUE);
b8dc484b	157
de876dd1	158	Int_t nTrackRef = (Int_t)branch->GetEntries();
b8dc484b	159
	160	track = trackSave = -999;
	161	Bool_t isNewTrack;
30d3ea8a	162	Int_t iHitMin, iChamber, detElemId;
b8dc484b	163
	164	trackParam = new AliMUONTrackParam();
	165	hitForRec = new AliMUONHitForRec();
b8dc484b	166
cc056de1	167	Int_t max = fRunLoader->GetHeader()->Stack()->GetNtrack();
b8dc484b	168	for (Int_t iTrackRef = 0; iTrackRef < nTrackRef; iTrackRef++) {
cc056de1	169
de876dd1	170	branch->GetEntry(iTrackRef);
b8dc484b	171
	172	iHitMin = 0;
	173	isNewTrack = kTRUE;
dba3c809	174
29fc2c86	175	if (!trackRefs->GetEntries()) continue;
b8dc484b	176
29fc2c86	177	while (isNewTrack) {
068e4c36	178
	179	muonTrack = new AliMUONTrack();
	180
b8dc484b	181	for (Int_t iHit = iHitMin; iHit < trackRefs->GetEntries(); iHit++) {
	182
	183	trackReference = (AliTrackReference*)trackRefs->At(iHit);
	184	x = trackReference->X();
	185	y = trackReference->Y();
	186	z = trackReference->Z();
	187	pX = trackReference->Px();
	188	pY = trackReference->Py();
	189	pZ = trackReference->Pz();
	190
	191	track = trackReference->GetTrack();
	192
cc056de1	193	if(track >= max){
	194	AliWarningStream()
	195	<< "Track ID " << track
	196	<< " larger than max number of particles " << max << endl;
	197	isNewTrack = kFALSE;
	198	break;
	199	}
b8dc484b	200	if (track != trackSave && iHit != 0) {
	201	iHitMin = iHit;
	202	trackSave = track;
	203	break;
	204	}
	205
	206	// track parameters at hit
	207	trackParam->SetBendingCoor(y);
	208	trackParam->SetNonBendingCoor(x);
	209	trackParam->SetZ(z);
cc056de1	210
b8dc484b	211	if (TMath::Abs(pZ) > 0) {
	212	bendingSlope = pY/pZ;
	213	nonBendingSlope = pX/pZ;
	214	}
	215	pYZ = TMath::Sqrt(pYpY+pZpZ);
	216	if (pYZ >0) inverseBendingMomentum = 1/pYZ;
	217
	218	trackParam->SetBendingSlope(bendingSlope);
	219	trackParam->SetNonBendingSlope(nonBendingSlope);
	220	trackParam->SetInverseBendingMomentum(inverseBendingMomentum);
	221
	222	hitForRec->SetBendingCoor(y);
	223	hitForRec->SetNonBendingCoor(x);
	224	hitForRec->SetZ(z);
	225	hitForRec->SetBendingReso2(0.0);
30d3ea8a	226	hitForRec->SetNonBendingReso2(0.0);
	227	detElemId = hitForRec->GetDetElemId();
	228	if (detElemId) iChamber = detElemId / 100 - 1;
	229	else iChamber = AliMUONConstants::ChamberNumber(z);
b8dc484b	230	hitForRec->SetChamberNumber(iChamber);
b8dc484b	231
068e4c36	232	muonTrack->AddTrackParamAtHit(trackParam,0);
b8dc484b	233	muonTrack->AddHitForRecAtHit(hitForRec);
b8dc484b	234	muonTrack->SetTrackID(track);
cc056de1	235
b8dc484b	236	trackSave = track;
	237	if (iHit == trackRefs->GetEntries()-1) isNewTrack = kFALSE;
	238	}
cc056de1	239
b8dc484b	240	// track parameters at vertex
b8dc484b	241	particle = fRunLoader->GetHeader()->Stack()->Particle(muonTrack->GetTrackID());
cc056de1	242
b8dc484b	243	if (particle) {
cc056de1	244
b8dc484b	245	x = particle->Vx();
	246	y = particle->Vy();
	247	z = particle->Vz();
	248	pX = particle->Px();
	249	pY = particle->Py();
	250	pZ = particle->Pz();
	251
	252	trackParam->SetBendingCoor(y);
	253	trackParam->SetNonBendingCoor(x);
	254	trackParam->SetZ(z);
	255	if (TMath::Abs(pZ) > 0) {
	256	bendingSlope = pY/pZ;
	257	nonBendingSlope = pX/pZ;
	258	}
	259	pYZ = TMath::Sqrt(pYpY+pZpZ);
	260	if (pYZ >0) inverseBendingMomentum = 1/pYZ;
	261	trackParam->SetBendingSlope(bendingSlope);
	262	trackParam->SetNonBendingSlope(nonBendingSlope);
	263	trackParam->SetInverseBendingMomentum(inverseBendingMomentum);
	264
	265	muonTrack->SetTrackParamAtVertex(trackParam);
	266	}
cc056de1	267
b8dc484b	268	AddMuonTrackReference(muonTrack);
068e4c36	269	delete muonTrack;
068e4c36	270	muonTrack = NULL;
b8dc484b	271
b8dc484b	272	} // end while isNewTrack
b8dc484b	273	}
	274
	275	CleanMuonTrackRef();
	276
	277	ReconstructibleTracks();
	278
b8dc484b	279	delete trackParam;
b8dc484b	280	delete hitForRec;
b8dc484b	281
	282	}
	283
	284	//____________________________________________________________________________
	285	TClonesArray* AliMUONRecoCheck::GetTrackReco()
	286	{
d19b6003	287	/// Return TClonesArray of reconstructed tracks
b8dc484b	288
45a05f07	289	fMUONData->ResetRecTracks();
	290	fMUONData->SetTreeAddress("RT");
	291	fTrackReco = fMUONData->RecTracks();
	292	fMUONData->GetRecTracks();
b8dc484b	293	fRecoTracks = fTrackReco->GetEntriesFast();
	294	return fTrackReco;
	295	}
	296	//_____________________________________________________________________________
	297	void AliMUONRecoCheck::PrintEvent() const
	298	{
d19b6003	299	/// Debug facility
b8dc484b	300
	301	AliMUONTrack *track;
	302	AliMUONHitForRec *hitForRec;
	303	TClonesArray * hitForRecAtHit = 0;
	304	Float_t xRec,yRec,zRec;
	305
	306	Int_t nTrackRef = fMuonTrackRef->GetEntriesFast();
	307
	308	printf(" ******************************* \n");
	309	printf(" nb of tracks %d \n",nTrackRef);
	310
	311	for (Int_t index = 0; index < nTrackRef; index++) {
	312	track = (AliMUONTrack*)fMuonTrackRef->At(index);
	313	hitForRecAtHit = track->GetHitForRecAtHit();
	314	Int_t nTrackHits = hitForRecAtHit->GetEntriesFast();
	315	printf(" track number %d \n",index);
	316	for (Int_t iHit = 0; iHit < nTrackHits; iHit++){
	317	hitForRec = (AliMUONHitForRec*) hitForRecAtHit->At(iHit);
	318	xRec = hitForRec->GetNonBendingCoor();
	319	yRec = hitForRec->GetBendingCoor();
	320	zRec = hitForRec->GetZ();
	321	printf(" x,y,z: %f , %f , %f \n",xRec,yRec,zRec);
	322	}
	323	}
	324	}
	325
	326	//_____________________________________________________________________________
	327	void AliMUONRecoCheck::ResetTracks() const
	328	{
d19b6003	329	/// Reset tracks
d19b6003	330
b8dc484b	331	if (fMuonTrackRef) fMuonTrackRef->Clear();
	332	}
	333	//_____________________________________________________________________________
	334	void AliMUONRecoCheck::CleanMuonTrackRef()
	335	{
d19b6003	336	/// Re-calculate hits parameters because two AliTrackReferences are recorded for
	337	/// each chamber (one when particle is entering + one when particle is leaving
	338	/// the sensitive volume)
b8dc484b	339
	340	Float_t maxGasGap = 1.; // cm
	341	AliMUONTrack track, trackNew;
	342	AliMUONHitForRec hitForRec, hitForRec1, *hitForRec2;
	343	AliMUONTrackParam trackParam, trackParam1, trackParam2, trackParamAtVertex;
	344	TClonesArray * hitForRecAtHit = 0;
	345	TClonesArray * trackParamAtHit = 0;
	346	Float_t xRec,yRec,zRec;
	347	Float_t xRec1,yRec1,zRec1;
	348	Float_t xRec2,yRec2,zRec2;
	349	Float_t bendingSlope,nonBendingSlope,bendingMomentum;
	350	Float_t bendingSlope1,nonBendingSlope1,bendingMomentum1;
	351	Float_t bendingSlope2,nonBendingSlope2,bendingMomentum2;
	352	TClonesArray *newMuonTrackRef = new TClonesArray("AliMUONTrack", 10);
	353	Int_t iHit1;
30d3ea8a	354	Int_t iChamber = 0, detElemId = 0;
b8dc484b	355	Int_t nRec = 0;
	356	Int_t nTrackHits = 0;
	357
	358	hitForRec = new AliMUONHitForRec();
	359	trackParam = new AliMUONTrackParam();
b8dc484b	360
b8dc484b	361	Int_t nTrackRef = fMuonTrackRef->GetEntriesFast();
b8dc484b	362	for (Int_t index = 0; index < nTrackRef; index++) {
	363	track = (AliMUONTrack*)fMuonTrackRef->At(index);
	364	hitForRecAtHit = track->GetHitForRecAtHit();
	365	trackParamAtHit = track->GetTrackParamAtHit();
	366	trackParamAtVertex = track->GetTrackParamAtVertex();
	367	nTrackHits = hitForRecAtHit->GetEntriesFast();
068e4c36	368	trackNew = new AliMUONTrack();
b8dc484b	369	iHit1 = 0;
	370	while (iHit1 < nTrackHits) {
	371	hitForRec1 = (AliMUONHitForRec*) hitForRecAtHit->At(iHit1);
	372	trackParam1 = (AliMUONTrackParam*) trackParamAtHit->At(iHit1);
	373	xRec1 = hitForRec1->GetNonBendingCoor();
	374	yRec1 = hitForRec1->GetBendingCoor();
	375	zRec1 = hitForRec1->GetZ();
	376	xRec = xRec1;
	377	yRec = yRec1;
	378	zRec = zRec1;
	379	bendingSlope1 = trackParam1->GetBendingSlope();
	380	nonBendingSlope1 = trackParam1->GetNonBendingSlope();
de876dd1	381	bendingMomentum1 = 0;
	382	if (TMath::Abs(trackParam1->GetInverseBendingMomentum()) > 0)
	383	bendingMomentum1 = 1./trackParam1->GetInverseBendingMomentum();
b8dc484b	384	bendingSlope = bendingSlope1;
	385	nonBendingSlope = nonBendingSlope1;
	386	bendingMomentum = bendingMomentum1;
	387	nRec = 1;
	388	for (Int_t iHit2 = iHit1+1; iHit2 < nTrackHits; iHit2++) {
	389	hitForRec2 = (AliMUONHitForRec*) hitForRecAtHit->At(iHit2);
	390	trackParam2 = (AliMUONTrackParam*) trackParamAtHit->At(iHit2);
	391	xRec2 = hitForRec2->GetNonBendingCoor();
	392	yRec2 = hitForRec2->GetBendingCoor();
	393	zRec2 = hitForRec2->GetZ();
	394	bendingSlope2 = trackParam2->GetBendingSlope();
	395	nonBendingSlope2 = trackParam2->GetNonBendingSlope();
de876dd1	396	bendingMomentum2 = 0;
	397	if (TMath::Abs(trackParam2->GetInverseBendingMomentum()) > 0)
	398	bendingMomentum2 = 1./trackParam2->GetInverseBendingMomentum();
b8dc484b	399
b8dc484b	400	if ( TMath::Abs(zRec2-zRec1) < maxGasGap ) {
cc056de1	401
b8dc484b	402	nRec++;
	403	xRec += xRec2;
	404	yRec += yRec2;
	405	zRec += zRec2;
	406	bendingSlope += bendingSlope2;
	407	nonBendingSlope += nonBendingSlope2;
	408	bendingMomentum += bendingMomentum2;
	409	iHit1 = iHit2;
	410	}
	411
	412	} // end iHit2
	413	xRec /= (Float_t)nRec;
	414	yRec /= (Float_t)nRec;
	415	zRec /= (Float_t)nRec;
	416	bendingSlope /= (Float_t)nRec;
	417	nonBendingSlope /= (Float_t)nRec;
	418	bendingMomentum /= (Float_t)nRec;
	419
	420	hitForRec->SetNonBendingCoor(xRec);
	421	hitForRec->SetBendingCoor(yRec);
	422	hitForRec->SetZ(zRec);
30d3ea8a	423	detElemId = hitForRec->GetDetElemId();
	424	if (detElemId) iChamber = detElemId / 100 - 1;
	425	else iChamber = AliMUONConstants::ChamberNumber(zRec);
b8dc484b	426	hitForRec->SetChamberNumber(iChamber);
	427	hitForRec->SetBendingReso2(0.0);
	428	hitForRec->SetNonBendingReso2(0.0);
	429	trackParam->SetNonBendingCoor(xRec);
	430	trackParam->SetBendingCoor(yRec);
	431	trackParam->SetZ(zRec);
	432	trackParam->SetNonBendingSlope(nonBendingSlope);
	433	trackParam->SetBendingSlope(bendingSlope);
de876dd1	434	if (TMath::Abs(bendingMomentum) > 0)
de876dd1	435	trackParam->SetInverseBendingMomentum(1./bendingMomentum);
b8dc484b	436
b8dc484b	437	trackNew->AddHitForRecAtHit(hitForRec);
068e4c36	438	trackNew->AddTrackParamAtHit(trackParam,0);
b8dc484b	439
	440	iHit1++;
	441	} // end iHit1
	442
	443	trackNew->SetTrackID(track->GetTrackID());
	444	trackNew->SetTrackParamAtVertex(trackParamAtVertex);
068e4c36	445	{new ((newMuonTrackRef)[newMuonTrackRef->GetEntriesFast()]) AliMUONTrack(trackNew);}
	446	delete trackNew;
	447	trackNew = NULL;
b8dc484b	448
	449	} // end trackRef
	450
	451	fMuonTrackRef->Clear();
	452	nTrackRef = newMuonTrackRef->GetEntriesFast();
	453	for (Int_t index = 0; index < nTrackRef; index++) {
	454	track = (AliMUONTrack*)newMuonTrackRef->At(index);
	455	AddMuonTrackReference(track);
	456	}
	457
b8dc484b	458	delete hitForRec;
b8dc484b	459	delete trackParam;
29fc2c86	460	newMuonTrackRef->Delete();
b8dc484b	461	delete newMuonTrackRef;
	462
	463	}
	464
	465	//_____________________________________________________________________________
	466	void AliMUONRecoCheck::ReconstructibleTracks()
	467	{
d19b6003	468	/// Calculate the number of reconstructible tracks
b8dc484b	469
	470	AliMUONTrack* track;
	471	TClonesArray* hitForRecAtHit = NULL;
	472	AliMUONHitForRec* hitForRec;
	473	Float_t zRec;
	474	Int_t nTrackRef, nTrackHits;
	475	Int_t isChamberInTrack[10];
	476	Int_t iChamber = 0;
	477	Bool_t isTrackOK = kTRUE;
	478
	479	fReconstructibleTracks = 0;
	480
	481	nTrackRef = fMuonTrackRef->GetEntriesFast();
	482	for (Int_t index = 0; index < nTrackRef; index++) {
	483	track = (AliMUONTrack*)fMuonTrackRef->At(index);
	484	hitForRecAtHit = track->GetHitForRecAtHit();
	485	nTrackHits = hitForRecAtHit->GetEntriesFast();
	486	for (Int_t ch = 0; ch < 10; ch++) isChamberInTrack[ch] = 0;
	487
	488	for ( Int_t iHit = 0; iHit < nTrackHits; iHit++) {
	489	hitForRec = (AliMUONHitForRec*) hitForRecAtHit->At(iHit);
	490	zRec = hitForRec->GetZ();
	491	iChamber = hitForRec->GetChamberNumber();
	492	if (iChamber < 0 \|\| iChamber > 10) continue;
	493	isChamberInTrack[iChamber] = 1;
cc056de1	494	}
	495	// track is reconstructible if the particle is depositing a hit
	496	// in the following chamber combinations:
	497
b8dc484b	498	isTrackOK = kTRUE;
cc056de1	499	if (!isChamberInTrack[0] && !isChamberInTrack[1]) isTrackOK = kFALSE;
	500	if (!isChamberInTrack[2] && !isChamberInTrack[3]) isTrackOK = kFALSE;
	501	if (!isChamberInTrack[4] && !isChamberInTrack[5]) isTrackOK = kFALSE;
	502	Int_t nHitsInLastStations=0;
	503	for (Int_t ch = 6; ch < AliMUONConstants::NTrackingCh(); ch++)
	504	if (isChamberInTrack[ch]) nHitsInLastStations++;
	505	if(nHitsInLastStations < 3) isTrackOK = kFALSE;
	506
	507	if (isTrackOK) fReconstructibleTracks++;
b8dc484b	508	if (!isTrackOK) fMuonTrackRef->Remove(track); // remove non reconstructible tracks
	509	}
	510	fMuonTrackRef->Compress();
	511	}
	512